A risk factor is something that increases your likelihood of getting a disease or condition.

It is possible to develop asthma with or without the risk factors listed below. However, the more risk factors you have, the greater your likelihood of developing asthma. If you have a number of risk factors, ask your doctor what you can do to reduce your risk.

Risk factors for asthma include:

It has been noted that asthma tends to run in families. People whose immediate blood relatives have asthma are more likely to develop the disease.

Genes and your environment play a role in the development of asthma. When asthma runs in families, genetic factors play a relatively large role. When asthma does not run in families, the genetic influence is not as significant as the environmental exposures.

People who have allergies (especially allergic rhinitis, eczema, and severe food allergies) have a greater chance of developing asthma. Allergens that may be associated with asthma include:

Pollen

Animal dander

Mites

Molds

Dust and dust mites

Certain foods

The following medical conditions increase your risk of developing asthma:

Revision Information

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.